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參數(shù)資料
| 型號： | LA1140 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | FM IF System for Car Radio |
| 中文描述： | 如果系統(tǒng)的汽車收音機(jī)調(diào)頻 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 518K |
| 代理商： | LA1140 |
Proper cares in using LA1140
1)
The detector transformers should be designed to develop a quadrature signal (pin 11) of higher than 175 mVrms
(approximately 105 dBμ) under high antenna signal input. If the quadrature signal strength is less than 125 mVrms, the
muting drive output (V14) cannot decrease to zero even in a strong signal strength. Furthermore, when the quadrature signal
strength lies between 125 mV and 175 mV, the muting drive output may move from zero to plus under high temperature
conditions.
When designing a PC board, special care should be given to the ground pattern layout by referring to that of the recommend
PC board example as shown below.
Do not connect a capacitor directly between pin 16 and ground. If the signal intensity of IF input varies in the vicinity of
90 dBμ, the voltage at pin 16 varies. Thus, charging/discharging current flows into the capacitor and goes to the muting drive
output (pin 14) through the inverter inside the IC, thereby causing the muting to malfunction.
2)
3)
Sample Application Circuit 1
Unit (resistance:
, capacitance: F)
F
TOKO
higher
[Maximum Att. Adj.]
lower
[Muting ON level Adj.]
[Slope Adj.]
[Slope Adj.]
LA1140
No. 729-9/15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA1143 | FM IF System for Car Radios |
| LA1145 | FM IF System (Quadrature Detector) for Car Radio |
| LA1145M | FM IF System (Quadrature Detector) for Car Radio |
| LA1150N | FM IF Amplifier for Car Radio |
| LA1175 | FM Front End For Car Radio, Home Stereo Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA1140_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:FM IF SYSTEM FOR CAR RADIO |
| LA1140B-E | 制造商:ON Semiconductor 功能描述:CAR RADIO FM IF SYSTEM - Ammo Pack |
| LA1140-E | 功能描述:射頻接收器 CAR RADIO FM IF SYSTEM RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| LA1143 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:FM IF System for Car Radios |
| LA1145 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:FM IF System (Quadrature Detector) for Car Radio |
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